Climate Insights for Jaru

Jaru, Rondônia, Brazil

Hottest
September
34°C peak
Coldest
July
20°C low
Wettest
March
279mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Jaru is hot. The average annual temperature is 26°C and approximately 1693mm of precipitation falls per year. March is the wettest month, receiving around 279mm of rainfall. Jaru is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: September, August, July. The coldest months are July, June, August, when temperatures can drop to 20°C.

Temperature

10° 20° 30° 40° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 30° Average: 25° Min: 23° Feb Max: 30° Average: 25° Min: 23° Mar Max: 30° Average: 25° Min: 23° Apr Max: 30° Average: 26° Min: 23° May Max: 30° Average: 25° Min: 22° Jun Max: 31° Average: 25° Min: 21° Jul Max: 33° Average: 26° Min: 20° Aug Max: 34° Average: 27° Min: 21° Sep Max: 34° Average: 28° Min: 23° Oct Max: 33° Average: 27° Min: 23° Nov Max: 31° Average: 26° Min: 23° Dec Max: 30° Average: 26° Min: 23°
Max
Average
Min

Jaru sees moderate temperature variation throughout the year, ranging from 20°C to 34°C. The warmest month is September, when average highs reach 34°C and the mean temperature sits around 28°C. July is the coolest month, with minimum temperatures around 20°C and an average of 26°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 249mm Feb Precipitation: 271mm Mar Precipitation: 279mm Apr Precipitation: 161mm May Precipitation: 77mm Jun Precipitation: 15mm Jul Precipitation: 2mm Aug Precipitation: 26mm Sep Precipitation: 59mm Oct Precipitation: 124mm Nov Precipitation: 176mm Dec Precipitation: 256mm
Precipitation

Jaru is a fairly wet location, receiving approximately 1693mm of precipitation annually, which averages out to around 141mm per month. The wettest month is March, averaging 279mm of rainfall. February and December also tend to see above-average precipitation. The driest month is July, with just 2mm. That's 277mm less than March, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Wind

0km/h 5km/h 10km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 9km/h Feb Wind Speed: 9km/h Mar Wind Speed: 8km/h Apr Wind Speed: 8km/h May Wind Speed: 9km/h Jun Wind Speed: 10km/h Jul Wind Speed: 10km/h Aug Wind Speed: 10km/h Sep Wind Speed: 10km/h Oct Wind Speed: 9km/h Nov Wind Speed: 9km/h Dec Wind Speed: 9km/h
Wind Speed

Jaru is relatively calm, with an average annual wind speed of 9km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, with average winds dropping to 8km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

Seasons

Winter
Dec 21
Spring
Sep 23
Summer
Dec 21
Autumn
Mar 20

88 days until Winter

It is currently autumn in Jaru, which began on March 20, 2026. Jaru is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in September at around 34°C, while the coldest stretch bottoms out in July near 20°C. Winter is next, beginning on June 21, 2026 — 88 days from now.

Spring

Temperatures range from 23 to 34°C. Rainfall is heavy, totalling around 359mm across the season with a monthly average of 120mm. Winds are generally light, averaging 9km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 23 to 30°C. Rainfall is heavy, totalling around 775mm across the season with a monthly average of 258mm. Winds are generally light, averaging 9km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 22 to 30°C. Rainfall is heavy, totalling around 517mm across the season with a monthly average of 172mm. Winds are generally light, averaging 8km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 20 to 34°C. Precipitation is minimal, with only around 42mm for the entire season. Winds are generally light, averaging 10km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Monthly Climate Data

The table below shows monthly climate averages for Jaru based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
23 °C
30 °C
9 km/h
249 mm
0 cm
Feb
23 °C
30 °C
9 km/h
271 mm
0 cm
Mar Current
23 °C
30 °C
8 km/h
279 mm
0 cm
Apr
23 °C
30 °C
8 km/h
161 mm
0 cm
May
22 °C
30 °C
9 km/h
77 mm
0 cm
Jun
21 °C
31 °C
10 km/h
15 mm
0 cm
Jul
20 °C
33 °C
10 km/h
2 mm
0 cm
Aug
21 °C
34 °C
10 km/h
26 mm
0 cm
Sep
23 °C
34 °C
10 km/h
59 mm
0 cm
Oct
23 °C
33 °C
9 km/h
124 mm
0 cm
Nov
23 °C
31 °C
9 km/h
176 mm
0 cm
Dec
23 °C
30 °C
9 km/h
256 mm
0 cm
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Metric (°C, km/h)